viewer: migrate to vue 3, general refactoring and cleanup

Non-exhaustive list of fixes and improvements done at the same time:

- html default background to grey (avoids white flash during init)
- unified links behavior
- added more theme variables
- removed the flex-expand transition (it wasn't working) and replaced it
  with a slide
- fixed LdLoading not centered on the content
- title on removable tags
- fixed an issue with encoded URI from vue-router
- unified Item resource URLs
- removed the iframe for PlainTextViewer (it wasn't working properly)
  and replaced it with a pre
- fixed clear and search buttons tabindex
- fixed the information panel bumping up during the fade animation of
  tag's dropdown
- fixed some focus outlines not appearing correctly
- moved CSS variables to the :root context
- Code cleaning

GitHub: closes #217
GitHub: closes #300
GitHub: closes #297
GitHub: closes #105
GitHub: closes #267
GitHub: closes #275
GitHub: closes #228
GitHub: closes #215
GitHub: closes #112

1 files changed, 99 insertions, 0 deletions

diff --git a/viewer/src/views/layout/left/LayoutInformation.vue b/viewer/src/views/layout/left/LayoutInformation.vue
new file mode 100644
index 0000000..780a458
--- /dev/null
+++ b/viewer/src/views/layout/left/LayoutInformation.vue
@@ -0,0 +1,99 @@
+<!-- ldgallery - A static generator which turns a collection of tagged
+--             pictures into a searchable web gallery.
+--
+-- Copyright (C) 2019-2022  Guillaume FOUET
+--
+-- This program is free software: you can redistribute it and/or modify
+-- it under the terms of the GNU Affero General Public License as
+-- published by the Free Software Foundation, either version 3 of the
+-- License, or (at your option) any later version.
+--
+-- This program is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+-- GNU Affero General Public License for more details.
+--
+-- You should have received a copy of the GNU Affero General Public License
+-- along with this program.  If not, see <https://www.gnu.org/licenses/>.
+-->
+
+<template>
+  <div
+    v-if="item"
+    class="flex-column"
+    :class="$style.infopanel"
+  >
+    <div
+      v-if="item.title"
+      :class="$style.title"
+    >
+      {{ item.title }}
+    </div>
+    <time
+      v-if="item.datetime"
+      :datetime="item.datetime"
+      :class="$style.datetime"
+    >
+      {{ formatDate }}
+    </time>
+    <LdMarkdown
+      v-if="item.description"
+      :class="$style.description"
+      :markdown="item.description"
+    />
+  </div>
+</template>
+
+<script setup lang="ts">
+import { Item } from '@/@types/gallery';
+import { LdMarkdown } from '@/components/async';
+import { computed, PropType } from 'vue';
+
+const props = defineProps({
+  item: { type: Object as PropType<Item>, required: true },
+});
+
+const formatDate = computed(() => {
+  const { datetime } = props.item;
+  const date = datetime.substring(0, 10);
+  const time = datetime.substring(11, 16);
+  return `${date} ${time}`;
+});
+</script>
+
+<style lang="scss" module>
+@import "~@/assets/scss/theme";
+
+.infopanel {
+  padding: 2px 2px 7px 7px;
+  overflow-wrap: break-word;
+
+  .title {
+    font-weight: bold;
+  }
+  .datetime {
+    font-size: 0.9em;
+    color: $palette-300;
+  }
+  .description {
+    padding-bottom: 7px;
+    > * {
+      margin-top: 5px;
+    }
+    ul,
+    ol {
+      margin-left: 1em;
+    }
+    ul {
+      list-style-type: disc;
+    }
+    a {
+      color: $palette-200;
+      &:hover {
+        color: $palette-050;
+        text-decoration: underline;
+      }
+    }
+  }
+}
+</style>